Photoinduced cyclizations of mono- and dianions of N-acyl-o-chloroanilines and N-acyl-o-chlorobenzylamines as general methods for the synthesis of oxindoles and 1,4-dihydro-3(2H)-isoquinolinones
作者:R. Richard Goehring、Yesh P. Sachdeva、Jyothi S. Pisipati、Mark C. Sleevi、James F. Wolfe
DOI:10.1021/ja00288a027
日期:1985.1
L'influence du rayonnement proche UV et l'effet d'inhibiteurs impliquent un mecanisme radicalaire en chaine
L'influence du rayonnement proche UV et l'effet d'inhibiteurs impliquent un mecanisme crazyaire en chaine
Synthesis of Indolonesvia Radical Cyclization ofN-(2-Halogenoalkanoyl)-Substituted Anilines
The radical reactions of N-(2-halogenoalkanoyl)-substitutedanilines (anilides) of type 1 have been investigated under various conditions. Treatment of compounds 1a–1o with Bu3SnH in the presence of (2,2′-azobis(isobutyronitrile) (AIBN) afforded a mixture of the indolones (oxindoles) 2a–2o and the reduction products 5a–5o (Table 1). In contrast, the N-unsubstituted anilides 1p–1s, 1u, and 1v gave the
Air-Stable Secondary Phosphine Oxide as Preligand for Palladium-Catalyzed Intramolecular α-Arylations with Chloroarenes
作者:Lutz Ackermann、Rubén Vicente、Nora Hofmann
DOI:10.1021/ol901597d
日期:2009.10.1
A palladium catalyst derived from air-stable secondary phosphine oxide (1-Ad)(2)P(O)H enabled efficient intramolecular alpha-arylations of amides with aryl chlorides, which allowed for the synthesis of diversely substituted (aza)oxindoles.
Improved Catalysts for the Palladium-Catalyzed Synthesis of Oxindoles by Amide α-Arylation. Rate Acceleration, Use of Aryl Chloride Substrates, and a New Carbene Ligand for Asymmetric Transformations
作者:Sunwoo Lee、John F. Hartwig
DOI:10.1021/jo005761z
日期:2001.5.1
alpha-aryloxindole derivatives. Surprisingly, catalysts containing tert-butylphosphine ligands, which have been most reactive for ketone arylations, were less active than those containing PCy(3). Use of new, optically active heterocyclic carbene ligands gave substantial enantioselectivity in formation of an alpha,alpha-disubstituted oxindole. In contrast, a variety of optically active phosphine ligands
Synthesis of Oxindoles via Direct Photolysis of N-(2-Bromoaryl)alkanamides
作者:Lidong Cao、Chaozhong Li
DOI:10.1002/cjoc.201090278
日期:2010.9
The directphotolysis of N‐(2‐bromoaryl)alkanamides in refluxing acetonitrile with NaHCO3 as the base afforded the corresponding oxindoles in moderate to high yields under transition‐metal‐free and radical‐initiator‐free conditions.